forked from Mirrors/freeswitch
245060e5a9
git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@3738 d0543943-73ff-0310-b7d9-9358b9ac24b2
139 lines
3.8 KiB
C
139 lines
3.8 KiB
C
/*-
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* Copyright (c) 1999,2000
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* Konstantin Chuguev. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Konstantin Chuguev
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* and its contributors.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* iconv (Charset Conversion Library) v1.0
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*/
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#include <stdlib.h> /* free, malloc */
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#define ICONV_INTERNAL
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#include <iconv.h>
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static const char * const names[] = {
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"iso-10646-ucs-2", "ucs-4", "ucs4", NULL
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};
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static const char * const *
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ucs4_names(struct iconv_ces *ces)
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{
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return names;
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}
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static apr_ssize_t
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convert_from_ucs(struct iconv_ces *ces, ucs_t in,
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unsigned char **outbuf, apr_size_t *outbytesleft)
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{
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int *state = (int*)ces->data;
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int bytes;
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if (in == UCS_CHAR_NONE)
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return 1; /* No state reinitialization for table charsets */
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bytes = *state ? 4 : 8;
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if (*outbytesleft < bytes)
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return 0; /* No space in output buffer */
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if (*state == 0) {
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*(*outbuf)++ = 0;
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*(*outbuf)++ = 0;
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*(*outbuf)++ = 0xFE;
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*(*outbuf)++ = 0xFF;
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*state = 1;
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}
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*(*outbuf)++ = (in >> 24) & 0xFF;
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*(*outbuf)++ = (in >> 16) & 0xFF;
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*(*outbuf)++ = (in >> 8) & 0xFF;
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*(*outbuf)++ = in & 0xFF;
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*outbytesleft -= bytes;
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return 1;
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}
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static APR_INLINE ucs_t
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msb(const unsigned char *buf)
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{
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return (buf[0] << 24) | (buf[1] << 16) | (buf[2] << 8) | buf[3];
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}
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static ucs_t
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convert_to_ucs(struct iconv_ces *ces,
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const unsigned char **inbuf, apr_size_t *inbytesleft)
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{
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ucs_t res;
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int *state = (int*)ces->data;
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int mark;
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if (*inbytesleft < 4)
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return UCS_CHAR_NONE; /* Not enough bytes in the input buffer */
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res = msb(*inbuf);
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switch (res) {
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case UCS_CHAR_ZERO_WIDTH_NBSP:
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*state = 1;
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mark = 1;
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break;
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case UCS_CHAR_INVALID:
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*state = 2;
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mark = 1;
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break;
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default:
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mark = 0;
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}
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if (mark) {
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if (*inbytesleft < 8)
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return UCS_CHAR_NONE; /* Not enough bytes in the input buffer */
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*inbytesleft -= 4;
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res = msb(*inbuf += 4);
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}
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if (*state == 2) {
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res = (unsigned char)(*(*inbuf) ++);
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res |= (unsigned char)(*(*inbuf) ++) << 8;
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res |= (unsigned char)(*(*inbuf) ++) << 16;
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res |= (unsigned char)(*(*inbuf) ++) << 24;
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} else
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*inbuf += 4;
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*inbytesleft -= 4;
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return res;
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}
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static const struct iconv_ces_desc iconv_ces_desc = {
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apr_iconv_ces_open_func,
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apr_iconv_ces_close_func,
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apr_iconv_ces_reset_func,
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ucs4_names,
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apr_iconv_ces_nbits8,
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apr_iconv_ces_zero,
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convert_from_ucs,
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convert_to_ucs,
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NULL
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};
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struct iconv_module_desc iconv_module = {
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ICMOD_UC_CES,
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apr_iconv_mod_noevent,
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NULL,
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&iconv_ces_desc
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};
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